Given: As i understand it, the result comes back with time since the epoch, in milliseconds The current time as UTC milliseconds from the epoch. Given that my test always sets the objects the same, why are results coming up different as time goes by? UPDATE: I continue to second guess myself due to For the sa…
Tag: java
Java enums – choice between fields, abstract methods, and class level map
I have written a Java enum where the values have various attributes. These attributes could be stored in any of the following ways: Using fields: Using abstract methods: Using class level map: How should I decide when to prefer which? Thanks! Answer (I am answering my own question so that I can share some thi…
How to search in a List of Java object
I have a List of object and the list is very big. The object is Now I have to search for a specific value of an object in the list. Say if value3==’three’ I have to return those objects (My search is not always based on value3) The list is What is the efficient way of doing it? Thanks. Answer
Java—how can I dynamically reference an object’s property?
In javascript, I can do this: Can I do anything close in Java? Answer Yes, you can do it by reflection with something along the following lines: However, if you are not very familiar with Java, this approach should be avoided if at all possible, as it is somewhat dangerous and error prone. For instance, there…
Create a List of byte[]
How might you go about creating a List of byte[] (not Byte)? I want something like the following: Answer That will work fine because arrays are objects in Java, so you can build Lists out of them. Note that only in Java 7 can you do In older versions you must restate the byte[]: This has been brought up alrea…
How to terminate a JOptionPane ConfirmDialog from an actionListener
I use this line to show my ConfirmDialog int yn = JOptionPane.showConfirmDialog(frame.getParent(), scrollPane, “stuffs”, JOptionPane.OK_CANCEL_OPTION); In that ConfirmDialog I have …
Declaring a List field with the final keyword
If I have the following statement within a class where Synapse is an abstract type: Does final allow me to still be able to change the state of the Synapse objects in the List, but prevent me from adding new Synapse objects to the list? If I am wrong, could you please explain what final is doing and when I
Efficient implementation for: “Python For Else Loop” in Java
In Python there is an efficient for .. else loop implementation described here Example code: In Java I need to write more code to achieve the same behavior: Is there any better implementation similar to Python for .. else loop in Java? Answer It’s done like this:
How to login to a spring security login form using cURL?
I am working on a springMVC project in which the user authentication is based on spring security. the idea is to have a mobile (android) application to be able to send some sort of data to backend. So before get my hand dirty into android developing I decided to mock the situation of login form using cURL. th…
Selecting class by Maven build profile
I am quite new to Maven and Java EE programming all-together. I would like to create a stub class for authentication testing which should be activated in the default Maven build profile. Currently I have two classes with same name but in different packages. Is it possible to somehow select the correct class t…